Add Kazakhstan frequencies (#7209)

As reported by @KZ1R , Kazakhstan has frequencies in use for Lora devices that are not covered by our existing band selections.

This adds
* KZ_433 433.075 - 434.775 MHz <10 mW EIRP, Low Powered Devices (LPD)
* KZ_863 863 - 868 MHz <25 mW EIRP, 500kHz channels allowed, must not be used at airfields

Legal ref provided in #7204 and verified.

https://www.gov.kz/memleket/entities/mdai/press/article/details/6128
 Order of the Ministry of Investments and Development of the Republic of Kazakhstan No. 34 dated January 21, 2015.
 Published on 01 July 2024 19:03 Updated on 01 July 2024

Fixes #7204

Author: fifieldt

src/mesh/RadioInterface.cpp

@@ -161,6 +161,14 @@ const RegionInfo regions[] = {
     RDEF(PH_433, 433.0f, 434.7f, 100, 0, 10, true, false, false), RDEF(PH_868, 868.0f, 869.4f, 100, 0, 14, true, false, false),
     RDEF(PH_915, 915.0f, 918.0f, 100, 0, 24, true, false, false),
 
+    /*
+        Kazakhstan
+                433.075 - 434.775 MHz <10 mW EIRP, Low Powered Devices (LPD)
+                863 - 868 MHz <25 mW EIRP, 500kHz channels allowed, must not be used at airfields
+                                https://github.com/meshtastic/firmware/issues/7204
+    */
+    RDEF(KZ_433, 433.075f, 434.775f, 100, 0, 10, true, false, false), RDEF(KZ_863, 863.0f, 868.0f, 100, 0, 30, true, false, true),
+
     /*
        2.4 GHZ WLAN Band equivalent. Only for SX128x chips.
     */
@@ -681,4 +689,4 @@ size_t RadioInterface::beginSending(meshtastic_MeshPacket *p)
 
     sendingPacket = p;
     return p->encrypted.size + sizeof(PacketHeader);
-}
+}